Concrete Stairs Calculator

Calculate the concrete volume needed for constructing stairs and landings with this easy-to-use calculator.

Calculate Your Concrete Stairs Calculator

Stair Dimensions

Stair Width (ft)

Riser Height (in)

Tread Depth (in)

Number of Steps

Include Landing?

Include Waste Factor?

Waste Factor (%)

Accurately estimating concrete for stairs is essential for any construction project. Stairs have a unique geometry that requires careful calculation to ensure you order the right amount of concrete.

This calculator helps you determine the exact volume of concrete needed for your staircase, considering both the visible portion of the steps and the underlying structure.

How to Use This Calculator

Enter the width of your stairs in feet
Input the riser height (vertical rise of each step) in inches
Enter the tread depth (horizontal part you step on) in inches
Specify the number of steps in your staircase
Indicate whether you need a landing, and if so, enter its dimensions
Choose whether to include a waste factor for additional material
Click "Calculate Concrete Requirements" to get your results

Understanding Your Results

The calculator provides concrete volume in both cubic feet and cubic yards (the unit typically used when ordering concrete). It also estimates how many 80lb bags of pre-mixed concrete you would need if you prefer to mix it yourself rather than ordering ready-mix concrete.

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Frequently Asked Questions

For a typical residential staircase with 4 steps (each 3 feet wide with 7-inch risers and 11-inch treads), you'll need approximately 10-12 cubic feet (or about 0.4 cubic yards) of concrete. However, this varies greatly depending on your specific stair design and dimensions.

Yes, concrete stairs should generally be reinforced with rebar or wire mesh, especially for exterior applications or stairs that will bear significant weight. The reinforcement helps prevent cracking and adds structural integrity to the stairs.

The standard thickness for concrete stairs is typically between 4 and 6 inches, depending on local building codes and the intended use. For heavy traffic or commercial applications, thicker concrete may be required.

While concrete begins to harden within a few hours, you should wait at least 24-48 hours before light foot traffic. For full strength, allow 28 days of curing time. In colder weather, curing times may be longer.

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